Filter



R. R. CURTIS FILTER 2 SHEETS-SHEET l Filed Dec. 26, 1946 F Em HC ER yu. E w R MZ a i m R. R. CURTIS Aug. 5, 1952 FILTER 2 SHEETS-SHEET 2 Filed DeC. 26, 1946 RUSSELL R. CuRTla.

Patented Aug. 5, 1952 `Nr orifice v 2,605,902 FILTER Russell R'. Curtis, Dayton, Ohio, assigner to Curtis Automotive Devices', Inc., Dayton, Ohio', a corf poration of Ohio appneanonneesmser 26,1946, serial Ne. 718,307

4 Claims. (Cl. 21u-65) This invention relates to drain valve-equipped should be understood that the principles of the.

invention are generally applicable to filter units and the like wherein sediment is liable to collect and should be periodically removed.

According to this invention, the glass bowl'for a filter is equipped with a drain besson the bottoniv wall thereof. Adi-ain valve composed of a hollow stem and a valve seat-engaging seal is slidably mounted in the boss. A spring presses against a retainer on the stem to urge the seal against its seat.

raise the stem and retainer into the drain boss, thereby liitingther seal olf of its face and exposing outlet ports in the tube to the interior ofthe bowl. Drainage of the bowl can thereupon take place through the, tubeand any/.sediment or filtered-out impurities at the bottom ofthe bowl will be washed out of the bowl through the valve. v y

The bowl or' the filter is equipped with a cover having inlet and outlet ports. Thiscover is held in sealed relationwith the open top of the bowl by a wire bail swingably carried in a yoke on the coverV and having hook-like ends vengageable under the bowl. A' cam lever acts on the bail between the furcations of the yoke to tighten the bail against the bowl. The cover has recesses in its face which are Iarranged to receive either the open mouth of a large-diameter ceramic-type filter cup, or a smallediameter screen-type cup'. A spring holds either of these cups against the cover so that fuel must iirst fiow throughthe inlet port of the cover intothe bowl and thence through a'filter to the outlet port in the cover.

Heretofore it has been necessary to remove the bowl from a bowl-type filter for cleaning sediment out or the bowl. The vpresent invention makes possible removal of sediment from the bowl by mere pressing of a spring-pressed drain valve. Inv addition the present vinvention makes possible the removalf or replacement of filtercupsin the' bowl by simple swinging of a cam'controllingV a bail.

It is, then. an object of the invention to pro-v A handle on the stem is con--` veniently positioned for manual grasping to Z vide a filter having a conveniently-operated sediment drain valve. l

Another object of the invention is to provide a glass bowl-type filter with a drain valve that operates through an aperture in the bowl with'- out chipping or cracking the glass.

A still further object of the inventionA is to provide a bowl-type lter with a cover` arranged to receive different types of filter units in sealed engagement therewith.

Another object of the invention is to provide a bowl-type lterfwith a cam-actuated bail to detachably connect the bowl in sealing relation with a ported cover. f

Other and further objects of this invention will be apparent to those skilled in the art from. the following detailed description of the annexed sheets of drawings which, by'way of a preferred example only, illustrate 'one embodiment of the invention.

On the drawings:

Figure l is a front elevational viewoi a bowln type filter according to this invention.

Figure'2 is a side elevational'view of the filter.

Figure 3 is a top plan view of the filter.

Figure l is a bottom plan view of the filter.

Figure 5 is a vertical cross-sectional View taken along the line rV---V'of Figure l, and showing the drain valvein opened yposition together with a ceramic ycup filter in the bowl.

"Figure 6 is a view similar to Figure 5, but showing the` drain valve in closed position, and illustrating a screen lter cup inthe bowl.

Figure 7 is Ya 'fragmentary horizontal ycross sectional view taken along the' line VlI--VII of Figure 8 is an exploded fragmentary yvertical '.cros's-seetional viewillustrating the manner inv which the parts of the drain valve lare assembled. Asshownonthe drawings: i Y,

Thebowl-type filter l0 of Figures lto 6V inclusive includes a transparent bowl ll formed of glass `or the like, a die-cast metal -v or molded plastic cover l2, a bail assembly ltfor uniting the bowl and cover in sealed relation, and .a drain valve I4 in the bottom of the bowl il.

As best shown in Figures 5 and 6, the bowl Il is composed of glass or other transparent material and has a side wall l la of circular cross section tapering slightly outward vfrom a bottom wall IIb to an open-top bounded byv a flat rim VI ic. A chamber l5 is'thus provided by thebovvl f iV-.A hcllowboss Hd depends from thebottom .wal-l [lb and is surrounded by a grooveor recess lle, which groove, in turn, is surrounded by a rounded bead Hf. y,

A recess or central well Hg is provided in the bottom IIb communicating with the bottom of the chamber I5. This recess IIg has a beveled valve seat IIh in the central portion of its bottom. A cylindrical passage I Ii extends from the bottom of the valve seat IIh to an outwardly tapered passage IIy' in the hollow boss IId. A shoulder I Ilc is provided between the cylindrical bore II. and the passage IIa'.

The cover I2 has a cylindrical skirt I2a for surrounding the open top of the bowl I I. A sealing ring or gasket I6 is seated in a groove I2b formed in the bottom face of the cover adjacent the skirt I 2a and projects from this groove to seat on the fiat rim IIc of the bowl.

An annular rib I2c depends form the bottom face of the cover in spaced concentric relation in wardly from the skirt I2c. This rib surrounds a stepped passage in the central portionof the cover including a rst shoulder I 2d, a second shoulder I2e, and a chamber I'I in the axial central portion of the cover. This chamber I'I communicates through a radially extending passage I8 with the outlet boss I2f of the cover The cover has an inlet boss I2g communicating with a passage I9 providing a port communieating with the interior of the bowl adjacent the side wall IIaof the bowl. As shown in Figure 7, the rib I2c is cut away at this port I9.

The port arrangement of the cover I2 is such that fluid to be filtered enters the inlet boss I2g and is fed through the port I9 into the top of the bowl I I adjacent the side wall of the bowl. The iiuid fills the entire bowl, and is discharged upwardly through the central .chamber I'I in the cover and thence radially through the passage i8 and out of the outlet boss I2f. Before the fluid can leave the bowlto enter the chamber I'I, it must pass through a filter cup which,.as shown in Figures and 6, can take several forms. In Figure 5, a ceramic filter cup 2Q is provided. This cup has an open top sized for fitting within the rib I2c in thrusting relationship against the shoulder I2d. A seal ring 2I overlies the rim wall 20a of the open top of the cup and has a peripheral fiange 2Ia surrounding the cup. This flange 2 Ia is cut away at the port I 9, as shown in Figure r7, so as to leave the port unobstructed. The flange 2Ia prevents shifting of the seal ring on the rim wall 20a and protects the rim edge of the cup 26 against chipping when the cup is being inserted in the cover. Since the filter cup 2D is composer of ceramic material which might chip, a screen disk 22 is preferably mounted on topof the cup to prevent entrainment'of any chipped ofl ceramic material in the outgoing fluid. As shown, the screen is mounted on top of the seal ring 2I and is bottomed on the shoulder I2d.

The bottom of the cup 20 has an annularrrib 20h depending therefrom, anda coil spring 23 has one end coil lsurrounding this rib 2Gb and bottomed on the cup, and the opposite end coil bottomed in the recess IIg of the bowl. The spring 23 is compressed to urge the cup 20 into `constant thrusting relationship with the shoulder I2d of the cover, thereby preventing leakage of unfiltered material from the bowl chamber I5 'into the outlet chamber I'I.

The alternate arrangement of Figure 6, a screen cup 24 is used in place of the ceramic cup 20, and has an open top bottomed on the second shoulder I 2e of the cover I2. This open top of the screen cup fits snugly within the stepped passage between the shoulders IZd-and I2c. The cup has a cylindrical side wall 24a Vand a flat bottom 24h with a depending fiange 24o secured to the lower end portion of the side wall 24a thereby providing a retainer for the spring 23 since the upper end coils of the spring are surrounded by the flange 24e.

A comparison of Figures 5 and 6 will show that the cover I2 is adapted to receive either a ceramic-type filter cup 2D, or a screen-type cup 24. The fluid in passing from the bowl chamber I5 to the outlet chamber I'I must flow through one of the two types of filter cups, and any solids in the fluid are filtered out.

The filtered-out solids can collect as sediment on the bottom of the bowl and the drain valve I4 is usefulforperiodic removal of the settled-out sediment. As shown best in Figure 8, the drain valve I4 includes a cylindrical tube 25. a seal washer 26, a coil sring 21, a fiber retainer 28,

A and a handle 29. The tube 25 is composed of metal and has a sliding fit in the bore I Ii of the bowl. It has a closed end 25a with a reduced neck portion 25D bounded on one side by a fiat radial shoulder 25e and on the other side by an outwardly flaring flange 25d. The seal ring 26 slips over the flange 25d and snugly hugs the neck 25h. The ring 26 is bottomed on the shoulder 25e and the iiange 25d is flattened to the position shown in Figures 5 and 6 for coacting with the shoulder 25o to confine the opposite fiat faces of the ring 26. As shown, the flattened iiange projects radially beyond the shoulder 25e to form a head H backing up the ring 26 almost to the circumference of the ring. The opposite face of the rink 26 projects radially beyond the shoulder 25e to coact with the seat IIh of the bowl.

The tube 25 has ports 25e adjacent the closed end 25a and joining the cylindrical exterior of the tube with the hollow interior thereof. The opposite end of the tube has a reduced-diameter portion 25f bottomed at a shoulder 25g,

The coil spring 2l' fits freely around the tube 25 in the tapered passage II7` of the boss IId and is bottomed on the shoulder IIk of the boss.

The fiber retainer 28 is cylindrical and fitsk rather snugly on the tube 25. VThis retainer 28 has a diametersized to fit within the enlarged end of the passage IIa of the boss IId and its end face forms an abutment for the spring 2'I.

A handle 29, in the form of a flat metal strip. is provided for bottoming the retainer 28 and for facilitating manual operation of the valve. The handle 29 has an aperture 29a receiving the reduced-diameter portion 25! of the tube therethrough to bottom the handle on the tube shoulder 25g. The projecting end'of'the portion 25f is spun outwardly or headed to form a ange 25h overlying the handlearound the 'aperture 29a thereof and thereby secures the handle to the tube 25.

The Valve can be easily assembled in several ways. One method of assembly includes the mounting of the spring 2l, the retainer 28, and the handle 29 on the tube 25. The assembly is then applied to the bowl II with the tube in the bore Iii and the closed end'25a of the tube projecting above the bottom of the bowl. The seal ring 26 is thenslipped over the inclined fiange 25d of the tube and is bottomed on the shoulder 25e around the neck portion 25h. The flange 25d is then fiattened to form the head 25e. Another method of assembly includes the mounting of the seal ring 26 on the tube, and the insertion of the tube through the bottom'of the bowl so thatrit's reduced end 25f will project beyond .the boss IId. The spring, the retainer, and the handle are then inserted in position on the tube, and the portion 25h of the tube is formed to retain the handle against the shoulder'd. Y f;

As shown in Figure 6, thedrainvalve'IIl is spring pressed to a Closed "position against the seat I lh, and, in this position, the seal ring 26 sealingly engages the seat. When it is desired to .openthelvalva the handle .lli is depressed toward the boss .I Id to raise the tube in thepassag'eivayl Iz'funtil the portsle `register with the recess, Ilg as. showninFigure.. 5. )In this open position', the'sediment in the bottom of thebowl will be.r flushed out with. liquid drainingthrou'gh the-ports and out ofthebottornllof'the tubei .In theopenposition of .,.the valve, as' shown in `'Figure 5, thefiber retainer 28will engage thelwall of the bore Ilyl before the handle 29-istrikes against thebottom of the bossv IId. Metalto glass contact is thereby avoided. -The ber re- .tainer in the closed position of the valvesliown Figure 6' still projects into the. bore I Ii'and limits lateral movement of the tube 25.

As best shown iii`,`li.f,'ures l 1` to'3, the bail assembly i3 for detachably connecting the bowl and vcover includes a bail wire of, generally U- shaped configuration Awith a, -bight portion Isa passed through aligned slots in ears I2I'1l of a yoke on the central portion of theV cover I2. As shown in Figure 2, these ears I2h each'ha'vea vertically elongated slot. A cam lever I3b receives the bight portion i3d of the bail wire therethrough and is positioned between the ears |271. This cam lever I3b is adapted to rock on a flat wall portion I2z' of the cover and has a cam surface arranged to raise and lower the bail wire I3 in the slots of the ears I2h as the lever is swung on its rocking surface. When the lever I3b is positioned as shown in dotted lines in Figure 2, the bail wire will be moved to lthe bottoms of the slots in the ears. When the lever is tilted to the solid line position shown in Figure 2, the cam will raise the bail wire to the tops of the slots. Ears I2y of a second yoke are provided on the inlet port portion I2g of the cover to receive the end of the lever I3?) therebetween so that a locking wire or pin (Figures 5 and 6) can be passed through the ears and lever for securing the lever in its bail-closing position.

The bail wire has side legs I3c, |30 straddling the cover and bowl, and the ends of these legs are hooked as at I3d to fit around the bead IIJc of the bottom of the bowl and project into the recess I Ie. When, as best shown in Figure 2, the lever I3b is in the solid line position for raising rthe bail wire to the tops of the slots in the ears I2h, the hook ends Itd of the wire will be locked tightly against the bead Hf of the bowl to sealingly connect the bowl il and cover E2. Under these conditions, the seal ring or gasket i6 is resiliently loaded so that the top' rim face IIc of the bowl will be pressed in sealing contact therewith. When it is desired to separate the cover and bowl, the lever I3b is raised to the dottedline position ci Figure 2, thereby lowering the bail wire in the slots in the ears I2h so that the hook ends I3d of the wire will depend beneath the bead Hf of the bowl. The bail is then swung as illustrated in dotted lines so that the hook ends will clear the bowl, and the bowl and cover are thereby readily separated.

The above descriptions show that theV invention provides a filter of the bowl type wherein sediment is easily flushed out of the bowl without separating the bowl from its cover, wherein a universal type cover accommodates diiierent Vto typesfof filter cups, andy wherein a quick-,acting bail arrangement detachably connects thebowl.

It will`of-cours be understood thatvaridus details of construction may be varied through a wide range without departing from Jthe principles low boss Vdepending from said bottom around the port thereof and radiallyv inward from said bead, a valve seat in said container aroundfsaid port, a-tubeextending through saidbcss and slidably mounted in said port, a head on said tube coacting with said seat, portsin said tube. adapted tonbe placed into and outof registra-f tion ,with the interior of the container, aspring -v surrounding said tube, va retainer surrounding saidtube and bottomingsaid spring, a-/handle on Vsaid tubebottoming said retainer, Asaidretainer fitting' within said hollow boss ,and adapted tov guide the tube longitudinally of the boss and port during opening and closing Amovements thereof, a cover for the open top of thecontainer, a bail mounted on said cover, and having hook yends selectively engaging said bead on the container on opposite sides of said hollow boss, a cam on said bail ooacting with said cover to tighten the bail on said bead of the container, said cover having an inlet port communicating with the top of the container adjacent the side wall thereof, said cover having an outlet port communieating with the central portion of the container, a iilter cup in said container separating said cover ports and bottomed on said cover, and a spring bottomed on said container acting on said cup to hold the cup in sealed engagement with the cover.

2. In a filter unit, a container having a valve seat at the bottom thereof, a cylindrical passageway extending irom. said seat, a tapered passageway diverging from the cylindrical passageway, a shoulder separating the tapered passageway and the cylindrical passageway, a tube siidaole in said cylindrical passageway and having a closed end, a rubber seal surrounding the closed end 0I' the tube an engaging the valve seat, said tube having ports adiacent the closed end, a spring bottomed on said shoulder, a handle on said tube, a retainer surrounding the tube bottomed on said handle, said spring being bottomed on Y said retainer, and said retainer being sized for tting in said tapered passageway to center the tube in the passageways, said retainer limiting upward movement of the tube to permit uncovering or said tube port but to limit further upward movement oi' the tube ai'ter the ports are compietely uncovered. v

3. A bowl-type iilter comprising a bowl having an open top and a ported bottom, a springpressed tube slidable in said port and having .a seal thereon urged against the bottom by said spring together with ports therethrough adapted to register with the bowl when the tube is clepressed against the pressure oi' the spring, a cover for the open top of said bowl having an inlet port registering with the top of the bowl near the side thereof andan outlet port registering with the top of the bowl at the axial central portion having an open top and a ported' bottom, a 10 spring-pressed tube slidable in said port and having a seal thereon urgedagainst the bottom of said bowl by said spring, said tube having' radial passages. adapted to register with the bowl when thetube is depressed against the pressure 15 of the spring, a retainer disposed about. a portion of said tube below'v said passages, said retainer being of soft material relative to said; bowl and cooperating with the portion of said bowl about said port to limit upward movement of said tube 2o relative to said bowl.. a cover for the open top of said bowl having an inlet port. registering with the; top of the bowl near the sides thereof andY an outlet por-t registering with the top. of. the bowl:

at the axial central portion thereof, .a filter .ele- 25V ment depending into .said bowl inthe ofw pas,- sageway between` said inlet andsaid outlet. ports and spring means holding the. lter: element. around the` outlet. port in sealed engagement. with the cover. 30

RUSSELL R.,

REFERENCES, CJTED The following references; are of record in thev file of this patent:

UNITED STATES PATENTS Number Name. Date 1,027,919. Smith q May 28,` 1912. 1,062,236 Hitchcock May 20.., 1913 1,107,485 Bowserl Aug. 18, 1914 1,148,689 Kepplev 1 Aug. 3, 191.5 1,352,961 Hills Sept. 14, 192,0 1,574,336 Blydenbmgh Feb. 23,192.6 1,709,237' Tekavec Apr. 16, 1929. 1,780,774 White Nov. 41930" 1,781,964 Thomas` et al Nov. 18,193.0 2,071,996 Baldwin 1 Feb. 23, 1937i 2,183,616 Korte Dec., 19, 1939 2,230,408 Lackey Feb. 4 19,41A 2,378,949 Post:V June 26, 1945 2,423,329 LeClair 1., July 1,1947 2,431,782 Walton et al DEQ. 2, 1947' FOREIGN PATENTS Number Country Date 351,705 Great Britain July 2,- 1931 523,919 Great Britain July 25, 1940 OTHER REFERENCES ingenious` Mechanisms for Designers and Inventers, by Jones, pages 5 and 6, 1930. 

